Header Reducers

Header Reducer, 3-Bolt Flange, 3.5 in. Inlet, 3 in. Outlet, Stainless Steel, Each

Part Number: STW-HCA3-53

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 4/27/2026 if shipped by air

Header Collector Adapter, Reducer, 3.5 in. 3-Bolt Flange, 2.5 in.Out., 6.0 in. OAL., 304L SS, Each

Part Number: STW-HCA3-52-5

Not Yet Reviewed

Estimated Ship Date: Monday 4/27/2026 if shipped by air

Header Reducer, Ball and Socket Flange, 2.5 in. Inlet, 2 in. Outlet, Steel, Painted, Each

Part Number: HED-21116

4.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 4/27/2026 if shipped by air

Header Reducer, Ball and Socket Flange, 3 in. Inlet, 2.25 in. Outlet, Steel, Painted, Each

Part Number: HED-21117

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Monday 4/27/2026 if shipped by air

HEADER COLLECTOR ADAPTER

Part Number: STW-HCA2-52-25O2

Not Yet Reviewed

Estimated Ship Date: Monday 4/27/2026 if shipped by air

Header Reducer, with Oxygen Sensor Bung, 3-Bolt Flange, 2.5 in. Inlet, 2 in. Outlet, Steel, Natural, Each

Part Number: HED-21106

Not Yet Reviewed

Estimated Ship Date: Monday 4/27/2026 if shipped by air

Header Reducer, 3-Bolt Flange, 2.5 in. Inlet, 2.25 in. Outlet, Oxygen Sensor Fitting, Steel, Each

Part Number: HED-21126

3.0 out of 5 stars ( 8 )

Estimated Ship Date: Monday 4/27/2026 if shipped by air

HEADER COLLECTOR ADAPTER

Part Number: STW-HCA3-52-5O2

Not Yet Reviewed

Estimated Ship Date: Jun 26, 2026 if ordered today

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HEADER COLLECTOR ADAPTER

Part Number: STW-HCA2-52O2

Not Yet Reviewed

Estimated Ship Date: Jun 26, 2026 if ordered today

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• Special Order

HEADER COLLECTOR ADAPTER

Part Number: STW-HCA32-25O2

Not Yet Reviewed

Estimated Ship Date: Jun 29, 2026 if ordered today

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HEADER COLLECTOR ADAPTER

Part Number: STW-HCA3-53-5O2

Not Yet Reviewed

Estimated Ship Date: Jun 29, 2026 if ordered today

• Drop Ship
• Special Order